Every 2-3 days have a "chop fest"! Fill a few tupperware boxes with lots of washed and chopped/sliced salad and veggies e.g. lettuce, carrots, cucumber, onions, mushrooms, peppers, baby tomatoes, corn, peas, beans, little broccoli florets, bean sprouts and so on.
Then anytime you want to prepare a quick salad, or stuff a pitta bread or add a few veggies to a stir fry - they all all ready for you! Like your own private salad bar!